Datasheet

LTC4357
4
4357fd
typical perForMance characteristics
OUT Current (I
OUT
vs V
IN
)
FET Turn-Off Time
vs GATE Capacitance
FET Turn-Off Time
vs Initial Overdrive
GATE Current vs Forward Drop
(I
GATE
vs DV
SD
)
DV
GATE
vs GATE Current
(DV
GATE
vs I
GATE
)
V
SD
(mV)
–50
–50
I
GATE
(µA)
–25
0
25
0 50
4357 G04
100 150
$V
GATE
= 2.5V
I
GATE
(µA)
0
0
$V
GATE
(V)
5
10
15
5 10 15 20
4357 G05
25
V
IN
> 18V
V
IN
= 12V
V
IN
= 9V
V
IN
(V)
0
I
OUT
(µA)
75
100
125
6 10 14
4357 G06
50
25
0
2 4
8
12
V
OUT
= 12V, V
IN
= V
DD
V
INITIAL
(V)
0
t
PD
(ns)
200
300
0.8
4357 G08
100
0
0.2
0.4
0.6
1.0
400
V
IN
= 48V
$V
SD
= V
INITIAL
–1V
FET Turn-Off Time
vs Final Overdrive
V
FINAL
(V)
–1
t
PD
(ns)
1000
1500
–0.2
4357 G09
500
0
–0.8
–0.6
–0.4
0
2000
V
IN
= 48V
$V
SD
= 55mV V
FINAL
FET Load Current vs DVSD
C
GATE
(nF)
0
t
OFF
(ns)
300
400
500
80
4357 G07
200
100
0
20
40
60
V
GATE
< V
IN
+ 1V
$V
SD
= 55mV –1V
∆V
SD
(mV)
0
LOAD CURRENT (A)
6
8
10
75
4357 G10
4
2
0
25
50
V
IN
= 48V WITH FET (FDB3632)
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